Acoustical horn of a loudspeaker



FIG. 1 is an elevational view of an acoustical horn of a loudspeaker, showing my new design;

FIG. 2 is a partially enlarged perspective view thereof, taken from FIG. 1; and,

FIG. 3 is another partially enlarged perspective view thereof, taken from FIG. 1. 

CLAIM The ornamental design for an acoustical horn of a loudspeaker, as shown and described. 